def mask_geometry(self):
if not self.parameters.geometry:
geom = QgsGeometry()
return geom, QgsRectangle()
geom = QgsGeometry(self.parameters.geometry) # COPY !!
if self.parameters.do_simplify:
if hasattr(self.canvas, 'mapSettings'):
tol = self.parameters.simplify_tolerance * \
self.canvas.mapSettings().mapUnitsPerPixel()
else:
tol = self.parameters.simplify_tolerance * \
self.canvas.mapRenderer().mapUnitsPerPixel()
if tol in list(self.simplified_geometries.keys()):
geom, bbox = self.simplified_geometries[tol]
else:
if self.has_simplifier:
simplifier = QgsMapToPixelSimplifier(QgsMapToPixelSimplifier.SimplifyGeometry,
tol)
geom = simplifier.simplify(geom)
if not geom.isGeosValid():
# make valid
geom = geom.buffer(0.0, 1)
bbox = geom.boundingBox()
self.simplified_geometries[tol] = (QgsGeometry(geom), QgsRectangle(bbox))
else:
bbox = geom.boundingBox()
return geom, bbox
def mask_geometry(self):
if not self.parameters.geometry:
geom = QgsGeometry()
return geom, QgsRectangle()
geom = QgsGeometry(self.parameters.geometry) # COPY !!
if self.parameters.do_simplify:
if hasattr(self.canvas, "mapSettings"):
tol = (self.parameters.simplify_tolerance *
self.canvas.mapSettings().mapUnitsPerPixel())
else:
tol = (self.parameters.simplify_tolerance *
self.canvas.mapRenderer().mapUnitsPerPixel())
if tol in list(self.simplified_geometries.keys()):
geom, bbox = self.simplified_geometries[tol]
else:
if self.has_simplifier:
simplifier = QgsMapToPixelSimplifier(
QgsMapToPixelSimplifier.SimplifyGeometry, tol)
geom = simplifier.simplify(geom)
if not geom.isGeosValid():
# make valid
geom = geom.buffer(0.0, 1)
bbox = geom.boundingBox()
self.simplified_geometries[tol] = (
QgsGeometry(geom),
QgsRectangle(bbox),
)
else:
bbox = geom.boundingBox()
return geom, bbox
class SimplifyGeometries(QgisFeatureBasedAlgorithm):
TOLERANCE = 'TOLERANCE'
METHOD = 'METHOD'
def icon(self):
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'simplify.png'))
def group(self):
return self.tr('Vector geometry tools')
def __init__(self):
super().__init__()
self.tolerance = None
self.method = None
self.simplifier = None
def initParameters(self, config=None):
self.methods = [self.tr('Distance (Douglas-Peucker)'),
'Snap to grid',
'Area (Visvalingam)']
self.addParameter(QgsProcessingParameterEnum(
self.METHOD,
self.tr('Simplification method'),
self.methods, defaultValue=0))
self.addParameter(QgsProcessingParameterNumber(self.TOLERANCE,
self.tr('Tolerance'), minValue=0.0, maxValue=10000000.0, defaultValue=1.0))
def name(self):
return 'simplifygeometries'
def displayName(self):
return self.tr('Simplify geometries')
def outputName(self):
return self.tr('Simplified')
def prepareAlgorithm(self, parameters, context, feedback):
self.tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
self.method = self.parameterAsEnum(parameters, self.METHOD, context)
if self.method != 0:
self.simplifier = QgsMapToPixelSimplifier(QgsMapToPixelSimplifier.SimplifyGeometry, self.tolerance, self.method)
return True
def processFeature(self, feature, feedback):
if feature.hasGeometry():
input_geometry = feature.geometry()
if self.method == 0: # distance
output_geometry = input_geometry.simplify(self.tolerance)
else:
output_geometry = self.simplifier.simplify(input_geometry)
feature.setGeometry(output_geometry)
return feature
class SimplifyGeometries(QgisFeatureBasedAlgorithm):
TOLERANCE = 'TOLERANCE'
METHOD = 'METHOD'
def icon(self):
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'simplify.png'))
def group(self):
return self.tr('Vector geometry tools')
def __init__(self):
super().__init__()
self.tolerance = None
self.method = None
self.simplifier = None
def initParameters(self, config=None):
self.methods = [self.tr('Distance (Douglas-Peucker)'),
'Snap to grid',
'Area (Visvalingam)']
self.addParameter(QgsProcessingParameterEnum(
self.METHOD,
self.tr('Simplification method'),
self.methods, defaultValue=0))
self.addParameter(QgsProcessingParameterNumber(self.TOLERANCE,
self.tr('Tolerance'), minValue=0.0, maxValue=10000000.0, defaultValue=1.0))
def name(self):
return 'simplifygeometries'
def displayName(self):
return self.tr('Simplify geometries')
def outputName(self):
return self.tr('Simplified')
def prepareAlgorithm(self, parameters, context, feedback):
self.tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
self.method = self.parameterAsEnum(parameters, self.METHOD, context)
if self.method != 0:
self.simplifier = QgsMapToPixelSimplifier(QgsMapToPixelSimplifier.SimplifyGeometry, self.tolerance, self.method)
return True
def processFeature(self, feature, feedback):
if feature.hasGeometry():
input_geometry = feature.geometry()
if self.method == 0: # distance
output_geometry = input_geometry.simplify(self.tolerance)
else:
output_geometry = self.simplifier.simplify(input_geometry)
feature.setGeometry(output_geometry)
return feature
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
method = self.parameterAsEnum(parameters, self.METHOD, context)
pointsBefore = 0
pointsAfter = 0
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, source.fields(),
source.wkbType(),
source.sourceCrs())
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
if method != 0:
simplifier = QgsMapToPixelSimplifier(
QgsMapToPixelSimplifier.SimplifyGeometry, tolerance, method)
for current, input_feature in enumerate(features):
if feedback.isCanceled():
break
out_feature = input_feature
if input_feature.geometry():
input_geometry = input_feature.geometry()
pointsBefore += input_geometry.geometry().nCoordinates()
if method == 0: # distance
output_geometry = input_geometry.simplify(tolerance)
else:
output_geometry = simplifier.simplify(input_geometry)
pointsAfter += output_geometry.geometry().nCoordinates()
out_feature.setGeometry(output_geometry)
sink.addFeature(out_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
QgsMessageLog.logMessage(
self.
tr('Simplify: Input geometries have been simplified from {0} to {1} points'
).format(pointsBefore, pointsAfter), self.tr('Processing'),
QgsMessageLog.INFO)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, feedback):
layer = dataobjects.getObjectFromUri(self.getParameterValue(
self.INPUT))
tolerance = self.getParameterValue(self.TOLERANCE)
method = self.getParameterValue(self.METHOD)
pointsBefore = 0
pointsAfter = 0
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
layer.fields().toList(), layer.wkbType(), layer.crs())
features = vector.features(layer)
total = 100.0 / len(features)
if method != 0:
simplifier = QgsMapToPixelSimplifier(
QgsMapToPixelSimplifier.SimplifyGeometry, tolerance, method)
for current, input_feature in enumerate(features):
out_feature = input_feature
if input_feature.geometry():
input_geometry = input_feature.geometry()
pointsBefore += input_geometry.geometry().nCoordinates()
if method == 0: # distance
output_geometry = input_geometry.simplify(tolerance)
else:
output_geometry = simplifier.simplify(input_geometry)
pointsAfter += output_geometry.geometry().nCoordinates()
out_feature.setGeometry(output_geometry)
writer.addFeature(out_feature)
feedback.setProgress(int(current * total))
del writer
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.
tr('Simplify: Input geometries have been simplified from {0} to {1} points'
).format(pointsBefore, pointsAfter))
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT), context)
tolerance = self.getParameterValue(self.TOLERANCE)
method = self.getParameterValue(self.METHOD)
pointsBefore = 0
pointsAfter = 0
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
if method != 0:
simplifier = QgsMapToPixelSimplifier(
QgsMapToPixelSimplifier.SimplifyGeometry, tolerance, method)
for current, input_feature in enumerate(features):
out_feature = input_feature
if input_feature.geometry():
input_geometry = input_feature.geometry()
pointsBefore += input_geometry.geometry().nCoordinates()
if method == 0: # distance
output_geometry = input_geometry.simplify(tolerance)
else:
output_geometry = simplifier.simplify(input_geometry)
pointsAfter += output_geometry.geometry().nCoordinates()
out_feature.setGeometry(output_geometry)
writer.addFeature(out_feature)
feedback.setProgress(int(current * total))
del writer
QgsMessageLog.logMessage(
self.
tr('Simplify: Input geometries have been simplified from {0} to {1} points'
).format(pointsBefore, pointsAfter), self.tr('Processing'),
QgsMessageLog.INFO)
def processAlgorithm(self, progress):
layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
tolerance = self.getParameterValue(self.TOLERANCE)
method = self.getParameterValue(self.METHOD)
pointsBefore = 0
pointsAfter = 0
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
layer.fields().toList(), layer.wkbType(), layer.crs()
)
features = vector.features(layer)
total = 100.0 / len(features)
if method != 0:
simplifier = QgsMapToPixelSimplifier(QgsMapToPixelSimplifier.SimplifyGeometry, tolerance, method)
for current, input_feature in enumerate(features):
out_feature = input_feature
if input_feature.geometry():
input_geometry = input_feature.geometry()
pointsBefore += input_geometry.geometry().nCoordinates()
if method == 0: # distance
output_geometry = input_geometry.simplify(tolerance)
else:
output_geometry = simplifier.simplify(input_geometry)
pointsAfter += output_geometry.geometry().nCoordinates()
out_feature.setGeometry(output_geometry)
writer.addFeature(out_feature)
progress.setPercentage(int(current * total))
del writer
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr(
"Simplify: Input geometries have been simplified from %s to %s points" % (pointsBefore, pointsAfter)
),
)
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
method = self.parameterAsEnum(parameters, self.METHOD, context)
pointsBefore = 0
pointsAfter = 0
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
source.fields(), source.wkbType(), source.sourceCrs())
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
if method != 0:
simplifier = QgsMapToPixelSimplifier(QgsMapToPixelSimplifier.SimplifyGeometry, tolerance, method)
for current, input_feature in enumerate(features):
if feedback.isCanceled():
break
out_feature = input_feature
if input_feature.geometry():
input_geometry = input_feature.geometry()
pointsBefore += input_geometry.geometry().nCoordinates()
if method == 0: # distance
output_geometry = input_geometry.simplify(tolerance)
else:
output_geometry = simplifier.simplify(input_geometry)
pointsAfter += output_geometry.geometry().nCoordinates()
out_feature.setGeometry(output_geometry)
sink.addFeature(out_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
QgsMessageLog.logMessage(self.tr('Simplify: Input geometries have been simplified from {0} to {1} points').format(pointsBefore, pointsAfter),
self.tr('Processing'), QgsMessageLog.INFO)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
tolerance = self.getParameterValue(self.TOLERANCE)
method = self.getParameterValue(self.METHOD)
pointsBefore = 0
pointsAfter = 0
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(),
layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
if method != 0:
simplifier = QgsMapToPixelSimplifier(QgsMapToPixelSimplifier.SimplifyGeometry, tolerance, method)
for current, input_feature in enumerate(features):
out_feature = input_feature
if input_feature.geometry():
input_geometry = input_feature.geometry()
pointsBefore += input_geometry.geometry().nCoordinates()
if method == 0: # distance
output_geometry = input_geometry.simplify(tolerance)
else:
output_geometry = simplifier.simplify(input_geometry)
pointsAfter += output_geometry.geometry().nCoordinates()
out_feature.setGeometry(output_geometry)
writer.addFeature(out_feature)
feedback.setProgress(int(current * total))
del writer
QgsMessageLog.logMessage(self.tr('Simplify: Input geometries have been simplified from {0} to {1} points').format(pointsBefore, pointsAfter),
self.tr('Processing'), QgsMessageLog.INFO)